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tait@ tses @stent @time DEXTER H. 'CHAMBERLAIN OF VEST ROXBURY, MASSACHUSETTS.

Lettere Patent No. 61,396, dated January 22, 1867. v

HAND STAMP.

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'IO ALL WHOM` IT MAY OONCERN:

Beit known that I, DEXTER H. CHAMBERLAIN, of' West Roxbury, in the county of Norfolk, and State ot' llIassachusetts, have invented a new and useful improvement in Cancelling Stamps; and do hereby declare that the following is a full, clear, and exact description of the same, reference lbeing had to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a side elevation. y

Figure 2, a vertical cross-section through the line :z: rv, of iig. 1; and

' Figure 3, a perspective view of the die-block with the plate and stud pin which carries the fold of the ribbon.

Similar letters represent like parts in the several gures.

The object ot' my invention is to simplify the construction ot the cancelling stamp, and to bring within a small compass the operative parts, so that by a simple movement they can be readily and easily adjusted; and the invention consists in mounting the typeswheels, which are of di'erent diameters, on separate and independent axes, and also in so `arranging the inking ribbon that it will be doubled under the die and types, and thus secure an increased number of impressions without a frequent change of the position of the ribbon. In the revolving type-wheel dating-stamps, as usually made, as' far as I am aware, vthe wheels are all mouted on a common axis, and i n case thc month and year wheel are of the same diameter as the dating or calendar wheel, a large space is required for the die in order to afford a suiiicient opening for the type-wheels. In other stamps smaller wheels are used, designating units and tens, mounted upon a common axis, and arranged side by side, so that when the units are exhausted in dating, the proper gure on the wheel designating the tens is' brought into line, and thus the dates for the month are completed.' This'mode of dating is attended with much inconvenience, inasmuch as any mistake made in revolving the two .wheels Inecessitatesa number of trial impressions before they can be adjusted to the required date. v

Referring tothe drawings, A represents the base of the device, having at its rear end an upright or standard, A. To the upper part of the standard A is pivoted an arm, C C', that carries the .type-wheels and spindles upon which the 'inking ribbon is wound. The said arm is held in a slightly elevated position by means of a spring, D, placed in front of the supporting standard A'. Qn the front end of the base, A', is a cushion, B, of common construction. The front p ortion of the arm C is elongated vertically, and is formed with an opening in its centre in which are placed the type-wl1eels a 6 c, for indicating respectively the day of the month, the Y month, and the year. a represents a large wheel, the periphery of which is formed of a ser-ies of teeth, on the outer -faces of which are gurcs to designate the day ot' the month. The axis of this Wheel is formed on the reduced end of a set-screw, a', as shown in iig. 2, and does not pass-*beyond the opposite face of the said wheel, thereby allowing the contiguous wheel b torevolvc freely. The wheel Z1 is of a smaller diameter than the wheely a, and isformed with twelve sides or faccs, upon which are thenamcs ofthe months. It is mountedon an axis, 1J', formed on a set-screw placed in the opposite side of the vertical portion of the arm C C, similarly to the axis o above described. c represents a still smaller wheel, and is formed with sides or faces upon which are marked a series of years; it is mounted on an axis, c", in a similar manner with the wheels a and 6. Each wheel is held in proper position by means of a pin',- e, lattached toa dat spring on the outside ofthe arm C', and entering one of a series o t holes formed forV the plurposc on one of the sides of each wheel. It will thus be seen that by constructing the wheels f different diameters, and arranging them to'rotate on separate and'independent axes, they may be very readily adjusted, andthe space required for marking the day, month,vand year may be very small To the lower part of the front portion C', of the arm C,'is secured the die-blockE, shown in g. 3, which may have on its under side any required impression. It` is attached to or forms a part of the plate F, which tits upon one side of the lowerpart of the arm C', to which latter the said plate is secured by means of a screw, so'V that it can readily be detached whenA necessary. The plate F is provided with an opening adapted to receive the several faces of the type-wheels, and admit of their making the proper impressions upon the article to be stamped. Extending forward from the plateI Fis a projection, F', bearing upon its outer end a cylindri cal pin or st udfG, which passes transversely across the'front of the arm'C, a little above the level of the dicblock E, for a purpose presently to be explained. Thelcentral portion of the arm C forms an oblong square,

'open at the upper and lower sides, the upper side being provided with aremovable cover, H. Within this opens ing are arranged two transverse spindles or reels upon which is wound the ,inking ribbon R. The said ribbon being properifyy saturated with thelinking vmaterial is wound' upon one of the reels, and passes down underneath thedie-block over the above-described pin or-stud G, thence returning 11n-der' and in Contact with the die-block to the other 1 -eel, thus forming a. double thickness of the inking ribbon between the die-block and the article to be stamped. By this means an increasedsupplyoi in'k is furnished to the types, causing e more distinct and sure impression than that made a single ribbon, and obviating the'necessity of frequent change of position of the ribbon, rendering itelso much more durable than a single ribbon. The ribbon is mundfromone reel to the other, es occasion requires, by-means of handles KJg. 2, d

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The type-wheels a b c, of different diameters, and mounted u'pon separate and independent axes, as and for the purposeset forth. Y v l l ,2, I'claim the combinationV of the ink-ing ribbon with two reels and a stud in such a manner esto form a double fold of the ribbon underneath the type-rilieels or die-block, substantiaily as and for the purpose spe'cied.

Intestimony'ivhereof I have signed my name to this specification in the presenceof-two subscribing witnesses.

DEXTER H. CHAMBERLAIN.

Witnesses:

J. H. ADAMS, DAMEL F.' FITz. 

